CN208074221U - Buffer homing position type check-valves - Google Patents

Abstract

The utility model discloses a buffer reset type check valve, which comprises a valve body. The inside of the valve body is a valve cavity. The inside of the valve body is provided with a valve core and a positioning shell. The axial position of the positioning shell is provided with a through groove. The core is installed in the front of the through groove; one side of the positioning shell is provided with a first positioning tube, and the first positioning tube is equipped with a first return spring; the other side of the positioning shell is provided with a second positioning tube, and the second positioning tube is set There is a second return spring, the outer end of the first return spring is installed on one side of the valve core, and the outer end of the second return spring is installed on the other side of the valve core; the inner side wall of the valve body is provided with a first limit block, the middle position of the first limiting block is provided with a first water outlet hole, the other inner wall of the valve body is provided with a second limiting block, and the middle position of the second limiting block is provided with a second water outlet hole. The utility model has the function of limiting the position of the valve core, has high safety, high efficiency in controlling the check of water flow, and is easy to operate.

Description

Buffer reset check valve

technical field

The utility model relates to a check valve, in particular to a buffer reset check valve.

Background technique

Check valve refers to the valve that relies on the flow of the medium itself to automatically open and close the disc to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, the reverse rotation of the pump and the drive motor, and the discharge of the container medium. Check valves are also used on lines that supply auxiliary systems where the pressure may rise above system pressure. Check valves can be mainly divided into swing check valves and lift check valves. The function of this type of valve is to only allow the medium to flow in one direction and prevent the flow in the opposite direction. Usually this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the valve seat is acted on by the fluid pressure and the self-weight of the valve disc to cut off the flow. The existing check valve has complex structure, no buffer mechanism, poor sealing performance, and low water flow check efficiency.

Utility model content

The utility model mainly solves the technical problems existing in the prior art, thereby providing a buffer reset check valve with the function of limiting the valve core, high safety, high efficiency of water flow check control, and simple operation. .

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions:

A buffer reset check valve, comprising a valve body, the inside of the valve body is a valve chamber, one end of the valve body is provided with a first connecting joint, the other end of the valve body is provided with a second connecting joint, and the inside of the valve body is provided with a The spool and the positioning shell, the cross section of the locating shell is circular, the axial position of the positioning shell is provided with a through groove, the valve core is installed in the front of the through groove; the front position of the spool is provided with a rubber sealing layer, and the rubber sealing layer Seal the through groove; one side of the positioning shell is provided with a first positioning tube, the first positioning tube is equipped with a first return spring, and the other side of the positioning shell is provided with a second positioning tube, and the second positioning tube is equipped with a second reset Spring, the outer end of the first return spring is installed on one side of the spool, the outer end of the second return spring is installed on the other side of the spool; an inner side wall of the valve body is provided with a first limit block, the first A first water outlet hole is provided in the middle of the limiting block, a second limiting block is provided in the other inner wall of the valve body, and a second water outlet hole is provided in the middle of the second limiting block.

Further, the diameter of the valve core is larger than the diameter of the through groove, the upper end of the valve core is set in front of the lower edge of the first water outlet hole, and the lower end of the valve core is set in front of the lower edge of the second water outlet hole ; The spool is arranged in front of the first limit block and the second limit block.

Further, a filter housing is provided inside the valve body, a first filter net and a second filter net are provided inside the filter housing, and the first filter net and the second filter net are arranged in parallel.

Further, a first buckle is provided between one end of the first filter and the second filter, the first buckle is installed on an inner wall of the valve body, and the other end of the first filter and the second filter is There is a second buckle between them, and the second buckle is installed on the other inner wall of the valve body.

Further, the inner end of the first positioning tube is provided with a first stop rod, and the first stop rod is inserted into the inner end side of the first return spring.

Further, the inner end of the second positioning tube is provided with a second stop rod, and the second stop rod is inserted into the inner end side of the second return spring.

Further, a first filter screen cover is provided between the outer end of the first limiting block and the inner wall of the valve body, and the first filter screen cover is arranged on the outer periphery of the first water outlet hole.

Further, a second filter screen cover is provided between the outer end of the second limiting block and the inner wall of the valve body, and the second filter screen cover is arranged around the second water outlet hole.

With the buffer reset check valve of the above technical solution, the operator can install the check valve on the water delivery pipeline, install the check valve on the water delivery pipeline through the first connection joint and the second connection joint, The water flow in the water pipe flows into the first connecting joint, flows through the channel, and then flows to the second connecting joint. The water flow in the channel impacts the valve core, separating the valve core from the front part of the positioning shell, thereby realizing the opening of the check valve. The first return spring and the second return spring are elongated, and the valve core is limited by the first limit block and the second limit block to prevent the valve core from being washed away directly, and at the same time prevent the first return spring from contacting the second return spring. The second return spring is broken, and the first limit block and the second limit block play the role of safety protection; through the first water outlet hole and the second water outlet hole, the water flow can be facilitated; when the water flow in the water pipeline is reversed, The water flow directly hits the back of the valve core, and the valve core seals the through groove through the rubber sealing layer, thereby blocking the water flow and playing the role of water flow check, which is easy to operate.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of the buffer reset check valve of the present invention.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the utility model.

As shown in Figure 1, a buffer reset check valve includes a valve body 11, the inside of which is a valve chamber, one end of the valve body 11 is provided with a first connecting joint 12, and the other end of the valve body 11 is provided with The second connection joint 13, the inside of the valve body 11 is provided with a valve core 14 and a positioning shell 33, the cross section of the positioning shell 33 is in the shape of a ring, the axial position of the positioning shell 33 is provided with a through groove 34, and the valve core 14 is installed in the through hole. The front part of the groove 34; the front position of the valve core 14 is provided with a rubber sealing layer 15, and the rubber sealing layer 15 seals the through groove 34; one side of the positioning shell 33 is provided with a first positioning tube 16, and the first positioning tube 16 is set There is a first return spring 17, the other side of the positioning shell 33 is provided with a second positioning tube 19, the second positioning tube 19 is fitted with a second return spring 20, and the outer end of the first return spring 17 is installed on the valve core 14 On one side, the outer end of the second return spring 20 is installed on the other side of the valve core 14; an inner side wall of the valve body 11 is provided with a first limiting block 22, and the middle position of the first limiting block 22 is provided with a second A water outlet hole 23, the other inner wall position of the valve body 11 is provided with a second limiting block 25, and the middle position of the second limiting block 25 is provided with a second water outlet hole 26; the diameter of the valve core 14 is greater than that of the through groove 34 diameter, the upper end of the spool 14 is arranged in front of the lower edge of the first water outlet hole 23, and the lower end of the spool 14 is arranged in front of the lower edge of the second water outlet 26; the spool 14 is arranged in the first limit The front between the position block 22 and the second limit block 25; the inside of the valve body 11 is provided with a filter shell 28, and the inside of the filter shell 28 is provided with a first filter screen 29 and a second filter screen 30, and the first filter screen 29 Arranged in parallel with the second filter 30; a first buckle 31 is arranged between the first filter 29 and one end of the second filter 30, the first buckle 31 is installed on an inner wall of the valve body 11, the first filter A second buckle 32 is provided between the net 29 and the other end of the second filter screen 30, and the second buckle 32 is installed on the other inner wall of the valve body 11; the inner end of the first positioning pipe 16 is provided with a first stop Rod 18, the first stop rod 18 is plugged in the inner end side position of the first return spring 17; the inner end of the second positioning tube 19 is provided with a second stop rod 21, and the second stop rod 21 is plugged in The position of the inner end side of the second back-moving spring 20; a first filter screen cover 24 is arranged between the outer end of the first limit block 22 and the inner wall of the valve body 11, and the first filter screen cover 24 is arranged on the first water outlet hole 23 ; a second filter screen cover 27 is provided between the outer end of the second limiting block 25 and the inner wall of the valve body 11 , and the second filter screen cover 27 is arranged on the outer circumference of the second water outlet hole 26 .

The utility model buffer reset check valve, the operator can install the check valve on the water delivery pipeline, install the check valve on the water delivery pipeline through the first connecting joint 12 and the second connecting joint 13, The water flow in the water pipeline flows into the first connecting joint 12, flows through the through groove 34, and then flows to the second connecting joint 13, and the water flow in the through groove 34 impacts the valve core 14, so that the valve core 14 is separated from the front part of the positioning shell 33, In this way, the check valve is opened, the first return spring 17 and the second return spring 20 are elongated, and the first stopper 22 and the second stopper 25 play a position-limiting effect on the spool 14, preventing the spool 14 from Directly wash away, also prevent the first back-moving spring 17 and the second back-moving spring 20 from pulling off simultaneously, the first stopper 22 and the second stopper 25 play the effect of safety protection; Through the first outlet hole 23 and the second The water outlet hole 26 can facilitate the water outlet of the water flow; when the water flow in the water pipeline is reversed, the water flow directly impacts the back side of the spool 14, and the spool 14 seals the through groove 34 by the rubber sealing layer 15, thereby blocking the water flow and playing a role. The function of water flow check is simple to operate.

Wherein, the diameter of spool 14 is greater than the diameter of through groove 34, and the upper end of spool 14 is arranged in front of the lower edge of first water outlet hole 23, and the lower end of spool 14 is arranged at the bottom of second water outlet 26. the front of the edge; the spool 14 is set in front of the first limit block 22 and the second limit block 25; so the accuracy is high, the spool 14 can accurately seal the through groove 34, and at the same time, the spool 14 is in the In the opened state, the smooth flow between the second water outlet hole 26 and the first water outlet hole 23 can also be ensured.

Wherein, the inside of the valve body 11 is provided with a filter housing 28, and the inside of the filter housing 28 is provided with a first filter screen 29 and a second filter screen 30, and the first filter screen 29 and the second filter screen 30 are arranged in parallel; A first buckle 31 is arranged between the net 29 and an end of the second filter net 30, and the first buckle 31 is installed on an inner wall of the valve body 11, between the other end of the first strainer 29 and the second strainer 30. A second buckle 32 is provided, and the second buckle 32 is installed on the other inner wall of the valve body 11 ; therefore, the water flow can be filtered through the first filter 29 and the second filter 30 .

Wherein, the inner end of the first positioning tube 16 is provided with a first stop rod 18, and the first stop rod 18 is inserted into the inner end side position of the first return spring 17; the inner end of the second positioning tube 19 is provided with The second stop rod 21 is plugged into the inner end side of the second return spring 20 ; therefore, the inner ends of the first return spring 17 and the second return spring 20 can be securely locked.

Wherein, a first filter screen cover 24 is arranged between the outer end of the first limiting block 22 and the inner wall of the valve body 11, and the first filter screen cover 24 is arranged on the outer periphery of the first water outlet hole 23; the second limiting block A second filter screen cover 27 is provided between the outer end of 25 and the inner wall of the valve body 11, and the second filter screen cover 27 is arranged on the outer periphery of the second water outlet hole 26; so through the first filter screen cover 24 and the second filter The mesh cover 27 can filter the water flow.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any change or replacement that is not thought of through creative work should be covered within the scope of protection of the utility model . Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (8)

1. A buffer reset type check valve, comprising a valve body (11), is characterized in that: the inside of the valve body (11) is a valve cavity, and one end of the valve body (11) is provided with a first connecting joint (12), The other end of the valve body (11) is provided with a second connecting joint (13), and the interior of the valve body (11) is provided with a valve core (14) and a positioning shell (33), and the cross section of the positioning shell (33) is annular , the axial position of the positioning shell (33) is provided with a through groove (34), the valve core (14) is installed in the front part of the through groove (34); the front position of the valve core (14) is provided with a rubber sealing layer (15) , the rubber sealing layer (15) seals the through groove (34); one side of the positioning shell (33) is provided with a first positioning tube (16), and the first positioning tube (16) is sleeved with a first return spring (17) , the other side of the positioning shell (33) is provided with a second positioning tube (19), the second positioning tube (19) is fitted with a second return spring (20), and the outer end of the first return spring (17) is installed on On one side of the spool (14), the outer end of the second back-moving spring (20) is installed on the other side of the spool (14); an inner side wall of the valve body (11) is provided with a first stopper (22 ), the middle position of the first limiting block (22) is provided with the first outlet hole (23), and the other inner wall position of the valve body (11) is provided with the second limiting block (25), the second limiting block The middle position of (25) is provided with the second water outlet hole (26). 2. The buffer reset check valve according to claim 1, characterized in that: the diameter of the spool (14) is larger than the diameter of the through groove (34), and the upper end of the spool (14) is set at the first water outlet In front of the lower edge of the hole (23), the lower end of the spool (14) is arranged in front of the lower edge of the second water outlet hole (26); the spool (14) is arranged on the first stop block (22) and The front between the second limit block (25). 3. The cushion reset check valve according to claim 1, characterized in that: a filter housing (28) is provided inside the valve body (11), and a first filter screen (29) is provided inside the filter housing (28). ) and the second filter screen (30), the first filter screen (29) and the second filter screen (30) are arranged in parallel. 4. The buffer reset check valve according to claim 3, characterized in that: a first buckle (31) is provided between one end of the first filter net (29) and one end of the second filter net (30), and the second A buckle (31) is installed on an inner wall of the valve body (11), a second buckle (32) is arranged between the other end of the first filter screen (29) and the second filter screen (30), and the second buckle Sheet (32) is installed on the other inner wall of valve body (11). 5. The buffer reset check valve according to claim 1, characterized in that: the inner end of the first positioning pipe (16) is provided with a first stop rod (18), and the first stop rod (18) is inserted into Connected to the inner end side position of the first return spring (17). 6. The buffer reset check valve according to claim 1, characterized in that: the inner end of the second positioning pipe (19) is provided with a second stop rod (21), and the second stop rod (21) is inserted into Connected to the inner end side position of the second return spring (20). 7. The buffer reset check valve according to claim 1, characterized in that: a first filter screen cover (24) is provided between the outer end of the first limit block (22) and the inner wall of the valve body (11) ), the first filter screen cover (24) is arranged on the outer periphery of the first water outlet hole (23). 8. The cushion reset check valve according to claim 1, characterized in that: a second filter screen cover (27) is provided between the outer end of the second limit block (25) and the inner wall of the valve body (11) ), the second filter screen cover (27) is arranged on the outer periphery of the second water outlet hole (26).